*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f5f7;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #e2122c;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #b80e23;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0d0d1a;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 3px solid #e2122c;
            padding-bottom: 0.35rem;
            display: inline-block;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin: 0.9rem 0;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0d0d1a 0%, #1a1a3a 100%);
            color: #fff;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            background: linear-gradient(135deg, #e2122c, #ff6b35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: #aaa;
            -webkit-text-fill-color: #aaa;
            font-size: 0.8rem;
            letter-spacing: 0.2em;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #e2122c;
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #ddd;
            padding: 0.5rem 0.9rem;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: #fff;
            background: rgba(226, 18, 44, 0.35);
            text-decoration: none;
        }
        .main-nav a.active {
            background: #e2122c;
            color: #fff;
        }
        .breadcrumb {
            background: #e9e9ed;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d4d4dc;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #888;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #e2122c;
        }
        .breadcrumb .current {
            color: #1a1a2e;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #0d0d1a 0%, #2a0a18 100%);
            color: #fff;
            padding: 2.5rem 0 2rem;
            text-align: center;
            border-bottom: 4px solid #e2122c;
        }
        .hero h1 {
            color: #fff;
            font-size: 2.6rem;
            margin: 0 0 0.6rem;
            text-shadow: 0 2px 16px rgba(226, 18, 44, 0.3);
        }
        .hero p {
            font-size: 1.15rem;
            color: #ccc;
            max-width: 680px;
            margin: 0 auto 1rem;
        }
        .hero .badge {
            display: inline-block;
            background: #e2122c;
            color: #fff;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            margin-top: 0.5rem;
        }
        .hero .badge i {
            margin-right: 0.4rem;
        }
        .last-update {
            display: block;
            margin-top: 1rem;
            font-size: 0.85rem;
            color: #aaa;
        }
        .last-update i {
            margin-right: 0.3rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .content-area {
            min-width: 0;
        }
        .sidebar {
            min-width: 0;
        }
        .card {
            background: #fff;
            border-radius: 14px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
            padding: 1.6rem 1.8rem;
            margin-bottom: 2rem;
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: box-shadow 0.2s ease;
        }
        .card:hover {
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
        }
        .card h2 {
            margin-top: 0;
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 0.8rem;
            margin: 1.2rem 0;
        }
        .code-item {
            background: #f9f9fc;
            border: 1px solid #e4e4ec;
            border-radius: 10px;
            padding: 0.8rem 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all 0.2s ease;
        }
        .code-item:hover {
            background: #f0f0f8;
            border-color: #c8c8d8;
            transform: translateY(-2px);
        }
        .code-item .code {
            font-family: 'Courier New', monospace;
            font-weight: 700;
            color: #0d0d1a;
            background: #e8e8f0;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            font-size: 0.85rem;
        }
        .code-item .status {
            font-size: 0.75rem;
            font-weight: 600;
            color: #0a7a3a;
            background: #dff2e4;
            padding: 0.15rem 0.6rem;
            border-radius: 12px;
        }
        .code-item .status.expired {
            color: #a00;
            background: #fdd;
        }
        .tip-box {
            background: #eef6ff;
            border-left: 4px solid #1a73e8;
            padding: 1rem 1.4rem;
            border-radius: 0 10px 10px 0;
            margin: 1.4rem 0;
        }
        .tip-box strong {
            color: #1a73e8;
        }
        .featured-img {
            border-radius: 14px;
            overflow: hidden;
            margin: 1.6rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            background: #e8e8f0;
        }
        .featured-img img {
            width: 100%;
            height: auto;
            display: block;
        }
        .featured-img figcaption {
            background: #f0f0f5;
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #555;
            text-align: center;
            border-top: 1px solid #ddd;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 0.3rem;
            color: #222;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.2s ease;
            background: #fafafa;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #e2122c;
            outline: none;
            background: #fff;
            box-shadow: 0 0 0 3px rgba(226, 18, 44, 0.1);
        }
        .btn {
            display: inline-block;
            background: #e2122c;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.2s ease;
            font-family: inherit;
        }
        .btn:hover {
            background: #b80e23;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(226, 18, 44, 0.25);
        }
        .btn-secondary {
            background: #2a2a4a;
        }
        .btn-secondary:hover {
            background: #1a1a3a;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.2rem;
            justify-content: flex-start;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #ccc;
            transition: color 0.15s ease;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .sidebar .card {
            padding: 1.2rem 1.4rem;
        }
        .sidebar .card h3 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #eee;
            padding-bottom: 0.4rem;
        }
        .link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .link-list li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f0f5;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: #333;
        }
        .link-list a:hover {
            color: #e2122c;
            text-decoration: none;
        }
        .link-list a i {
            color: #e2122c;
            width: 1.2rem;
            text-align: center;
        }
        .site-footer {
            background: #0d0d1a;
            color: #bbb;
            padding: 2.5rem 0 1.5rem;
            border-top: 4px solid #e2122c;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1rem;
            letter-spacing: 0.04em;
        }
        .site-footer a {
            color: #bbb;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #2a2a4a;
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.85rem;
        }
        .footer-bottom .copy {
            color: #888;
        }
        friend-link {
            display: block;
            background: #1a1a2e;
            padding: 1rem 1.4rem;
            border-radius: 10px;
            margin: 1rem 0 0.5rem;
            color: #ccc;
            font-size: 0.9rem;
        }
        friend-link a {
            color: #f0a0a8;
            margin: 0 0.3rem;
        }
        friend-link a:hover {
            color: #fff;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.3rem;
                padding: 0.8rem 0 0.2rem;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 0.6rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.5rem 0.8rem;
                width: 100%;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .card {
                padding: 1rem 1.2rem;
            }
            .code-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding: 0 0.8rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.3rem;
            }
            .hero h1 {
                font-size: 1.3rem;
            }
            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.85rem;
            }
            .featured-img {
                border-radius: 10px;
            }
        }
        .text-muted {
            color: #888;
            font-size: 0.85rem;
        }
        .mt-1 {
            margin-top: 0.6rem;
        }
        .mb-1 {
            margin-bottom: 0.6rem;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.6rem;
        }
        .emoji-big {
            font-size: 1.4em;
        }
        .anchor-offset {
            scroll-margin-top: 80px;
        }